rufus



no. 623,|83. Patented Apr. I8, 1899.

W. BUFUS- 8:. S. H. KRICHAUFF.

SPARK ARBESTER.

(Application filed Aug. 23, 1898) (N0 Modal.) 2 Sheets-Sheet 2.

W/Z'NESSES: lNVE/VTORS 9% wg 4, w W M [/2 I ATTORNEYS llwrrnn STATES T (ll/Z whom, it may concern.-

SoPHUs HENRY KRICHAUFF, engineers, subjects of the Queen of Great Britain and Ireland, residing at 75 King \Villiam street, in

the city of Adelaide, South Australia, have invented an Improved Spark-Arrester, of which the following is a specification.

This invention relates to a certain appli- IO ance for preventing the exit or escape of sparks and hot cinders from the funnels of locomotive or portable engines and the like.

The appliance consists of a series of metal louvers arranged upon a suitable frame and r5 pivotally supported, its situation being in the smoke-box or smoke-chamber, and the arrangement is such that the appliance constitutes a division between the outlet of the boiler-tubes and the inlet of the funnel or smoke-stack. A metal frameis provided for supporting the louvers above mentioned and when applied to large smoke-boxes is subdivided by means of a center ridge'bar, so that two sets of short louvers may be used in place of one set, thus reducing the liability of sag ging. The louvers are S-shaped in section and are kept apart from each other by means of space-bars arranged in such a manner as to leave a slight space or opening between adjacent louvers. Several of the louvers are supplied with short spoon-ended levers which are deflected by the draft or subsequent partial vacuum which is created by the exhauststeam ,thereby assisting in causing the louvers to oscillate, and thus allowing the smoke to escape, but at the same time the louvers form an effective barrier, whereby the sparks are bottom of the smokebox instead of being ejected from the funnel. We will now proceed to describe our invention in detail by the aid of the accompanying drawings, wherein- Figure 1 is a cross-sectional view and illus- 5 trates the interior of a large smoke-box with double set of louver-bars divided by a central ridge-bar. Fig. 2 is a sectional plan of same; Figs. 3 and at, elevation and plan of louver on larger scale; Figs. 5 and 6, sectional end views of louvers, showing position of spacebars and spoon-ended lever. Fig. 7 is aview Be it known that we, WILLIAM RUFUS and I arrested, so that they eventually drop to the PATENT QFFICE.

\YILLIAM RUFUS AND SOPHUS HENRY KRIOHAUFF, OF ADELAIDE, SOUTH AUSTRALIA.

SPARK-ARRESTEVR.

SPECIFICATION formingpart of Letters Patent No. 623,183, dated April 18, 1899.

Application filed August 23, 1898- Se'rial No. 689,297. (N0 model.)

similar to Fig. 1, and illustrates the interior of a small smoke-box, showing single set of louvers without an intervening rid ge-bar; and Fig. 8, side elevation of same. 5

Throughout the drawings similar letters of reference are used to denote similar or corresiponding parts Wherever they occur.

is the funnel or smoke-stack, situated above the smoke-box B.

O is the steam-pipe.

D is the exhaust; E, the boiler-tubes.

F is the metal frame for supporting the louvers and may be held in place by angleirons, as illustrated. The metal frame is preferably built up in sections and bolted or riveted together, leaving a slot or recess for the louver ends, as will be understood on reference to Fig. 3, an open space of sufficient size to prevent the cinders from accumulating 7o at the end of the louvers being arranged in the structure.

G is the center ridge-bar, Fig. l.

The louvers are shown at H, their ends or edges being turned over at 1-1. At the end of each louver a pivot or bearing H is fastened, whereby the louver is supported in the slot of the frame F. The rounded portions of the adjacent louver-pivots H should be sufficiently large to enable them to lie in contact with each other, so as to assist in maintaining the louvers in a parallel position, for which purpose their effective diameters can be increased by the addition of a ferrule or Washer. On each .side of the louver the space-bars H are arranged and project, respectively, above and below the louver, as illustrated. On'the underside of the louvers andat suitable intervals several spoon-ended levers J are fastened, their situation when in their lowest position being preferably opposite to the top row of tubes; but as they are capable of deflection they can be arranged so as not to interfere with tube-cleaning operations. The number of spoon-ended levers will be varied in accordance with the size of the smoke-box and the nature of the exhaust. When a center ridge-bar is used in large smoke boxes, we prefer to place the louvers at a slope or angle, as shown in Fig. 1:0 1; but on reference to the smaller smoke-box (shown in Fig. 7) it will be seen that the louvers pass across the smoke-box horizontally. It will, however, be understood that their general construction and arrangement is substantially-similar to that shown in the illustrations previously referred to.

On reference to Fig. 2 of the drawings it will be seen that the frame is built round about the steam-pipes C; but the intervening, space K may be fitted with a small metal platform, so that sparks cannot escape in its vicinity. It will also be seen that the frame is likewise built round about the exhaust-pipe D; but in this instance the platform, which fills the space L, is preferably made in the form of a well having sloping sides, so that it may act as a receptacle for the steam which falls from the funnel as a result of priming. A fitting for this pu rpose is necessary, whether the louvers are placed at a slope or angle, as in Fig. l, or are placed horizontally, as in Fig. 7.

The action of our appliance is as follows: As the steam exhausts from the cylinders through the blast-pipe it escapes from thence with great Velocity, finding an exit through the funnel and thus causing a partial vacu'u m, which in its turn has a tendency to draw sparks and cinders away from the fire together with the smoke; but the suddenness with which the vacuum is formed results in causing the louvers to oscillate, such oscillation being further assisted by the subsequent action of the draft upon the spoon-ended levers which are opposite to the boiler-tubes. The oscillating movement causes the space between each of thelouvers to open sufficiently to allow the hot air and smoke to escape, but the sparks are arrested by the horizontal edges of the louvers and eventually fall back again into the smoke-box. Any small sparks or particles of cinders which pass the bottom edge of the louvers are temporarilyentrapped do not fall foul of each other or become blocked.

In event of any of the louvers becoming sagged or bent they can be taken out of the frame and inverted, the spoon ends having been first removed and rearranged on the 0p posite side of such louvers.

Having now particularly described and asand certained the nature of on r said invention in what manner the same is to be performed, we declare that what we claim is- 1. In combination in aspark-arrester, a series of S-shaped section louvers having spacebars H extending between them and having pivots and supporting means in which the said pivots bear, substantially as described.

2. In combination with the smoke-box, a spark-arrester having a series of louvers, means for pivotally supporting the same and the levers attached to the louvers extending therefrom and exposed to the draft, substantially as described.

3. In combination with a smoke -box, a spark art-ester located therein comprising supporting means, a series of pivoted louvers arranged adjacent toeach other and spaced apart, and means for holding the louvers spaced apart consisting of the bars I1 substantially as described.

In witness whereof we have hereunto set our hands in presence of two witnesses.

WVILLIAM RUFUS. SOPHUS HENRY KRIUHAUFF.

Witnesses:

JOHN HERBERT CooKE, SAMUEL JAMES IlIITCHELL. 

